Yes, but some people don't pick up after their dogs, which is annoying.
Yes. As mentioned by others, you do need to collect any dog droppings to take out with you (there are trash cans at the trailhead)
Also please control your dog. If you let your dog pull you, it isn't under control and not everyone wants to be approached by your dog when you're not paying attention and chatting with someone and letting the dog go wherever it likes.
Yes but people using the trail need to pick up their dog poop very annoying to see it along the trail
Yes, very.
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